Related Experiment Video
Updated: Feb 4, 2026
10:54
Conventional Repetitive Transcranial Magnetic Stimulation for Depression: A Step-by-Step Protocol
Published on: November 21, 2025
461
Non-orthogonal one-step calibration method for robotized transcranial magnetic stimulation
He Wang1, Jingna Jin1, Xin Wang1
1Institute of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, Tianjin, 300192, China.
Biomedical Engineering Online
|October 5, 2018
Summary
A new one-step calibration method simplifies robotized transcranial magnetic stimulation (TMS) by combining hand/eye and coil calibration. This approach significantly reduces calibration errors and speeds up the process for precision brain stimulation.
Area of Science:
- Robotics and Automation
- Neuroscience and Neurotechnology
- Medical Imaging and Image Analysis
Background:
- Robotized transcranial magnetic stimulation (TMS) offers precision brain stimulation but requires complex, time-consuming pre-experiment calibration steps.
- Current methods involve separate hand/eye and coil calibration, with traditional coil calibration susceptible to significant errors.
Purpose of the Study:
- To develop and validate a novel one-step calibration method for robotized TMS systems.
- To simplify and improve the accuracy of hand/eye and coil calibration procedures.
Main Methods:
- A one-step calibration method was developed using matrix equation systems and a least-squares approach.
- This method integrates hand/eye and coil calibration by simultaneously estimating pose relationships.
- Calibration involves moving the robot to random positions and tracking marker and probe data.
Main Results:
- The novel method significantly outperformed traditional methods, reducing translational error by over 50% compared to QR24 and threefold to fourfold compared to handheld calibration.
- Rotational error was reduced sixfold to eightfold compared to handheld calibration.
- Convergence speed of the algorithms improved 16- to 27-fold.
Conclusions:
- The developed one-step method effectively calibrates robotized TMS systems.
- This approach simplifies complex calibration steps, enhancing efficiency and accuracy for precision brain stimulation.
Related Concept Videos
01:26Orthogonal Trajectories
67
Orthogonal trajectories describe the geometric relationship between two families of curves that intersect each other at right angles. One illustrative case involves a family of parabolas that open sideways along the x-axis. These curves share a common shape but differ by a scaling parameter, resulting in a set of curves that all pass through the origin and widen at different rates.Determining Orthogonal TrajectoriesTo identify the orthogonal trajectories for these parabolas, the first step...
67
01:11Glassware Calibration
1.4K
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
1.4K
01:12Instrument Calibration
753
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
753
01:10Calibration Curves: Correlation Coefficient
4.9K
In a linear calibration curve, there is a value called the calibration coefficient, denoted by 'r,' which measures the strength and the direction of association between two variables. The correlation coefficient value ranges from −1 to +1. A value of +1 indicates a perfect positive linear correlation, −1 denotes a perfect negative correlation, and 0 implies no correlation between the two variables. A positive correlation value establishes that as one variable increases, the...
4.9K
01:19Plotting and Calibrating the Root Locus
474
Root loci often diverge as system poles shift from the real axis to the complex plane. Key points in this transition are the breakaway and break-in points, indicating where the root locus leaves and reenters the real axis. The branches of the root locus form an angle of 180/n degrees with the real axis, where n is the number of branches at a breakaway or break-in point.
The maximum gain occurs at the breakaway points between open-loop poles on the real axis, while the minimum gain is...
The maximum gain occurs at the breakaway points between open-loop poles on the real axis, while the minimum gain is...
474
01:15Assessment of blood pressure in brachial artery(one-step method)
1.2K
This procedural guide systematically measures blood pressure using an oscillometric digital sphygmomanometer, emphasizing accuracy, patient safety, and comfort.
Prepare for the Procedure:
Prepare for the Procedure:
1.2K